Interactive Periodic Table of the Elements |
1
H
1.0
|
The number on top of the element's symbol is its atomic number, Z (the number of protons in the nucleus).
In the middle of the box there is a letter (or letters), the symbol for the element. Click the link to display information below.
The number underneath the symbol is the relative atomic mass of the element.
|
| Period |
GROUP
IA |
GROUP
IIA |
Transition Metals |
GROUP
IIIA |
GROUP
IVA |
GROUP
VA |
GROUP
VIA |
GROUP
VIIA |
GROUP
VIII (0) |
| 1 |
|
2
He
4.0 |
| 2 |
3
Li
6.9 |
4
Be
9.0 |
|
5
B
10.8 |
6
C
12.0 |
7
N
14.0 |
8
O
16.0 |
9
F
19.0 |
10
Ne
20.2 |
| 3 |
11
Na
23.0 |
12
Mg
24.3 |
|
13
Al
27.0 |
14
Si
28.1 |
15
P
31.0 |
16
S
32.1 |
17
Cl
35.5 |
18
Ar
40.0 |
| 4 |
19
K
39.1 |
20
Ca
40.1 |
21
Sc
45.0 |
22
Ti
47.9 |
23
V
50.9 |
24
Cr
52.0 |
25
Mn
54.9 |
26
Fe
55.9 |
27
Co
58.9 |
28
Ni
58.7 |
29
Cu
63.6 |
30
Zn
65.4 |
31
Ga
69.7 |
32
Ge
72.6 |
33
As
74.9 |
34
Se
79.0 |
35
Br
79.9 |
36
Kr
83.8 |
| 5 |
37
Rb
85.5 |
38
Sr
87.6 |
39
Y
88.9 |
40
Zr
91.2 |
41
Nb
92.9 |
42
Mo
95.9 |
43
Tc
98.9 |
44
Ru
101.1 |
45
Rh
102.9 |
46
Pd
106.4 |
47
Ag
107.9 |
48
Cd
112.4 |
49
In
114.8 |
50
Sn
118.7 |
51
Sb
121.8 |
52
Te
127.6 |
53
I
126.9 |
54
Xe
131.3 |
| 6 |
55
Cs
132.9 |
56
Ba
137.3 |
57
La
138.9 |
72
Hf
178.5 |
73
Ta
181.0 |
74
W
183.9 |
75
Re
186.2 |
76
Os
190.2 |
77
Ir
192.2 |
78
Pt
195.1 |
79
Au
197.0 |
80
Hg
200.6 |
81
Tl
204.4 |
82
Pb
207.2 |
83
Bi
209.0 |
84
Po
209 |
85
At
210 |
86
Rn
222 |
| 7 |
87
Fr
223 |
88
Ra
226 |
89
Ac
227 |
104
Rf
261 |
105
Ha
262.0 |
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